our teacher said"0 is not a multiple of 9"
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Every multiple of 0 is 0. Examples 0 x 0 = 0 0 x 9 = 0 0 x 43232434 = 0
That is 8001. For a number is divisible by 9, the digits must sum up to 9 (or a multiple of 9). So for 8000, the digits sum to 8 [8 + 0 + 0 + 0 = 8]. So you're only 1 away from 9 [8 + 0 + 0 + 1 = 9]
If you add up all the digits in a number and the sum is a multiple of 9 then the original number is also a multiple of 9. For example; 12,167,314,839,0181+2+1+6+7+3+1+4+8+3+9+0+1+8 = 54 = 6 x 9 therefore the original number is a multiple of 9, actually 1,351,923,871,002 x 9Use a calculator and try to divide the number by 9. If 9 divides into the number a whole number of times then the number is a multiple of 9.
No, 33 is not a multiple of 9.
No. 740 → 7 + 4 + 0 = 11 11 → 1 + 1 = 2 which is not one of 3, 6, 9 so 740 is not a multiple of 3.